沾化冬枣产地土壤元素分布特征及其对冬枣品质的影响

通过对沾化冬枣产地生态地球化学环境资料的系统整理,发现土壤中有益、有害元素的分布分配、迁移转化规律和赋存特征影响沾化冬枣的品质和食用安全性。对冬枣品质影响较大的元素有Mo、Cd、Co、Hg、S、N、Se等,其中Mo、Cd、Co、Hg、S含量过高时会降低冬枣果实的品质,尤以Hg、S、Cd影响最大,而N、Se可以提高冬枣的品质。结合基础研究成果,在土壤中增加Fe、K与水提取Se有效态含量或降低有效态B、Cu、P、N含量将有利于提高冬枣品质,该研究为冬枣统筹施肥和田间管理指明了方向。

THE DISTRIBUTION OF SOIL ELEMENTS AS WELL ASITS INFLUENCE ON THE QUALITY OF DONGZAO (WINTER JUJUBE) IN ZHANHUA DONGZAO GROWING AREA

Researches on the soil data of ecological geochemical environment in Zhanhua winter jujube growing area show that some important factors such as distribution,transform rule and modes of occurrence of beneficial and harmful elements in soils affect Zhanhua winter jujube quality and food safety.The elements such as Mo,Cd,Co,Hg,S,N and Se have the great influence on the quality of the winter jujube,and high content of Mo,Cd,Co,Hg and S,especially Hg,S and Cd,will reduce the fruit quality.Where these elements reach a certain content,they will severely reduce the fruit quality.On the contrary,the elements N and Se can improve the fruit quality of the winter jujube.It is suggested that the increase of the effective state content of Fe,K and water-extracting Se or decrease of the effective state content of B,Cu,P and N is favorable for the improvement of the winter jujube quality.The results obtained by the authors indicate clearly the way forward for fertilizer application and field management in growing winter jujube.